Heterogeneous magnetism and kinetic arrest in antiperovskite Mn3xNixGaC compounds with Ni2MnGa Heusler insertions

Ö. Çakır, E. Dias, K. R. Priolkar, A. Hoser, M. Farle, and M. Acet
Phys. Rev. B 102, 024431 – Published 20 July 2020

Abstract

Mn-based antiperovskite compounds in the form Mn3AX, where A is a main group element and X is C or N, undergo magnetostructural transitions with which these materials acquire magnetocaloric, giant magnetoresistance, and spin-transport properties, which can be modified or tailored by manipulating the compositions of numerous compounds. This enables closer investigations and better understandings of the underlying principles governing these properties. Mn3xNixGaC, which is a derivative of the prototype Mn3GaC antiperovskite, would normally be expected to form a cubic structure with a homogeneous composition. Contrary to this, we find that the addition of Ni leads to a heterogenous compound consisting of an antiperovskite part and a Ni2MnGa Heusler insertions. The system shows kinetic arrest features, which we study as a function of Ni composition using the techniques of x-ray diffraction, magnetization, and neutron diffraction under a magnetic field.

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  • Received 6 February 2020
  • Revised 4 June 2020
  • Accepted 2 July 2020

DOI:https://doi.org/10.1103/PhysRevB.102.024431

©2020 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Ö. Çakır

  • Physics Department, Yildiz Technical University, Istanbul, Turkey

E. Dias and K. R. Priolkar

  • Department of Physics, Goa University, Taleigao Plateau, Goa 403206, India

A. Hoser

  • Helmholtz-Zentrum Berlin für Materialien und Energie Hahn-Meitner-Platz 1, 14109 Berlin Germany

M. Farle and M. Acet*

  • Faculty of Physics, Duisburg-Essen University, D-47057 Duisburg, Germany

  • *mehmet.acet@uni-due.de

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Issue

Vol. 102, Iss. 2 — 1 July 2020

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